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Concomitant diseases in patients included in this cohort study.
| Concomitant Diseases | No. of Patients | |
|---|---|---|
| Abs. | % | |
| Chronic obstructive pulmonary disease | 9 | 64.3 |
| Chronic nonspecific lung disease | 1 | 7.1 |
| Coronary artery disease | 2 | 14.3 |
| Abnormal cardiac rhythm | 2 | 14.3 |
| Type 2 diabetes mellitus | 2 | 14.3 |
| Obesity | 2 | 14.3 |
| Gastric and duodenal ulcer disease | 1 | 7.1 |
